Release v1.6.0 dashboard architecture cleanup

tests/api/test_actuators.py

@@ -1,18 +1,19 @@
 from __future__ import annotations
 
-from time import perf_counter
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
+from time import perf_counter
 
+import pytest
 from fastapi.testclient import TestClient
 
+from app.api.v1.actuators import _deduplicate_actuator_ids
 from app.actuators.cache_db import DashboardCache
 from app.actuators.lifecycle import ActuatorReconciliationService
 from app.actuators.models import JobStatus, ModelSnapshot
 from app.actuators.store import ActuatorStore
 from app.behavior.engine import BehaviorEngine
 from app.config import Settings
-from app.api.v1.actuators import _deduplicate_actuator_ids
 from app.ha.discovery import DiscoveredEntity
 from app.ha.discovery import discover_entities
 from app.ha.history import (
@@ -467,6 +468,30 @@ def test_dashboard_reports_performance_budget_and_anomalies(tmp_path: Path) -> N
     assert anomalies_response.json()
 
 
+def test_dashboard_system_and_start_do_not_materialize_entity_cache(
+    tmp_path: Path,
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    with TestClient(app) as client:
+        _install_service(tmp_path)
+        client.get("/v1/actuators/discovery")
+        client.post("/v1/actuators", json={"actuator_entity_id": "light.abstellkammer"})
+
+        def fail_full_payload(self: DashboardCache) -> dict[str, object]:
+            raise AssertionError("full entity payload must not be loaded")
+
+        monkeypatch.setattr(DashboardCache, "load_entities_payload", fail_full_payload)
+
+        system_response = client.get("/v1/actuators/dashboard/system")
+        start_response = client.get("/v1/actuators/dashboard/start")
+
+    assert system_response.status_code == 200
+    assert system_response.json()["actuators"] == []
+    assert system_response.json()["cache"]["entity_count"] == 4
+    assert start_response.status_code == 200
+    assert start_response.json()["actuators"][0]["friendly_name"] == "Abstellkammer Licht"
+
+
 def test_actuator_detail_uses_compact_payload(tmp_path: Path) -> None:
     with TestClient(app) as client:
         _install_service(tmp_path)